Stop exception log in Big Switch unit tests
Stop exception log in Big Switch unit tests

Reduce unit test log sizes by removing stack trace
exception logging in Big Switch unit tests.

Closes-Bug: #1370898
Change-Id: Id808edb5db567db31b6c1366e20948683f20118a

adelina-t/neutron,SamYaple/neutron,Stavitsky/neutron,swdream/neutron,MaximNevrov/neutron,asgard-lab/neutron,cisco-openstack/neutron,suneeth51/neutron,magic0704/neutron,cloudbase/neutron-virtualbox,sebrandon1/neutron,SamYaple/neutron,mahak/neutron,takeshineshiro/neutron,JianyuWang/neutron,watonyweng/neutron,swdream/neutron,blueboxgroup/neutron,cloudbase/neutron,projectcalico/calico-neutron,adelina-t/neutron,noironetworks/neutron,Stavitsky/neutron,asgard-lab/neutron,mmnelemane/neutron,yuewko/neutron,openstack/neutron,CiscoSystems/neutron,vveerava/Openstack,mmnelemane/neutron,antonioUnina/neutron,dims/neutron,dims/neutron,mandeepdhami/neutron,wenhuizhang/neutron,klmitch/neutron,neoareslinux/neutron,SmartInfrastructures/neutron,aristanetworks/neutron,alexandrucoman/vbox-neutron-agent,alexandrucoman/vbox-neutron-agent,waltBB/neutron_read,blueboxgroup/neutron,igor-toga/local-snat,infobloxopen/neutron,leeseuljeong/leeseulstack_neutron,chitr/neutron,skyddv/neutron,cisco-openstack/neutron,javaos74/neutron,JianyuWang/neutron,rdo-management/neutron,openstack/neutron,SmartInfrastructures/neutron,bigswitch/neutron,klmitch/neutron,noironetworks/neutron,silenci/neutron,leeseuljeong/leeseulstack_neutron,vveerava/Openstack,bgxavier/neutron,bgxavier/neutron,wolverineav/neutron,paninetworks/neutron,gkotton/neutron,igor-toga/local-snat,mattt416/neutron,gkotton/neutron,infobloxopen/neutron,vivekanand1101/neutron,jacknjzhou/neutron,shahbazn/neutron,Metaswitch/calico-neutron,eayunstack/neutron,yanheven/neutron,leeseuljeong/leeseulstack_neutron,barnsnake351/neutron,jacknjzhou/neutron,cloudbase/neutron,glove747/liberty-neutron,gkotton/neutron,shahbazn/neutron,javaos74/neutron,pnavarro/neutron,skyddv/neutron,takeshineshiro/neutron,glove747/liberty-neutron,suneeth51/neutron,watonyweng/neutron,vivekanand1101/neutron,leeseulstack/openstack,leeseulstack/openstack,blueboxgroup/neutron,silenci/neutron,mattt416/neutron,miyakz1192/neutron,yanheven/neutron,eonpatapon/neutron,dhanunjaya/neutron,barnsnake351/neutron,openstack/neutron,aristanetworks/neutron,bigswitch/neutron,sasukeh/neutron,neoareslinux/neutron,huntxu/neutron,vveerava/Openstack,cloudbase/neutron-virtualbox,apporc/neutron,sasukeh/neutron,paninetworks/neutron,dhanunjaya/neutron,MaximNevrov/neutron,pnavarro/neutron,waltBB/neutron_read,NeCTAR-RC/neutron,mahak/neutron,chitr/neutron,eonpatapon/neutron,jumpojoy/neutron,Metaswitch/calico-neutron,miyakz1192/neutron,huntxu/neutron,wenhuizhang/neutron,JioCloud/neutron,sebrandon1/neutron,mahak/neutron,magic0704/neutron,JioCloud/neutron,leeseulstack/openstack,mandeepdhami/neutron,jumpojoy/neutron,jerryz1982/neutron,wolverineav/neutron,CiscoSystems/neutron,jerryz1982/neutron,CiscoSystems/neutron,yuewko/neutron,antonioUnina/neutron,rdo-management/neutron,apporc/neutron,projectcalico/calico-neutron,eayunstack/neutron,NeCTAR-RC/neutron